Alright, let's work through 21024671 times 73218353 step by step
21024671 × 73218353 = 73218353 × (21024671)
+ 73218353 × 1 that results in 73218353
+ 73218353 × 70 that is equal 5125284710
+ 73218353 × 600 yielding 43931011800
+ 73218353 × 4000 producing 292873412000
+ 73218353 × 20000 giving us 1464367060000
+ 73218353 × 000000 what gives us 0
+ 73218353 × 1000000 resulting in 73218353000000
+ 73218353 × 20000000 giving us 1464367060000000

= 1539391782986863
